WO2022083113A1 - Procédé et dispositif de freinage de véhicule, et train - Google Patents

Procédé et dispositif de freinage de véhicule, et train Download PDF

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Publication number
WO2022083113A1
WO2022083113A1 PCT/CN2021/094001 CN2021094001W WO2022083113A1 WO 2022083113 A1 WO2022083113 A1 WO 2022083113A1 CN 2021094001 W CN2021094001 W CN 2021094001W WO 2022083113 A1 WO2022083113 A1 WO 2022083113A1
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WO
WIPO (PCT)
Prior art keywords
distance
braking
vehicle
threshold
idling
Prior art date
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PCT/CN2021/094001
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English (en)
Chinese (zh)
Inventor
王田农
王延翠
杨丽丽
田庆
张祖伟
Original Assignee
中车青岛四方机车车辆股份有限公司
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Publication date
Application filed by 中车青岛四方机车车辆股份有限公司 filed Critical 中车青岛四方机车车辆股份有限公司
Priority to CA3198394A priority Critical patent/CA3198394C/fr
Priority to EP21881537.1A priority patent/EP4230500A4/fr
Publication of WO2022083113A1 publication Critical patent/WO2022083113A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L23/00—Control, warning or like safety means along the route or between vehicles or trains
    • B61L23/08—Control, warning or like safety means along the route or between vehicles or trains for controlling traffic in one direction only
    • B61L23/14—Control, warning or like safety means along the route or between vehicles or trains for controlling traffic in one direction only automatically operated
    • B61L23/18—Control, warning or like safety means along the route or between vehicles or trains for controlling traffic in one direction only automatically operated specially adapted for changing lengths of track sections in dependence upon speed and traffic density
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T7/00—Brake-action initiating means
    • B60T7/12—Brake-action initiating means for automatic initiation; for initiation not subject to will of driver or passenger
    • B60T7/22—Brake-action initiating means for automatic initiation; for initiation not subject to will of driver or passenger initiated by contact of vehicle, e.g. bumper, with an external object, e.g. another vehicle, or by means of contactless obstacle detectors mounted on the vehicle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/17—Using electrical or electronic regulation means to control braking
    • B60T8/1701—Braking or traction control means specially adapted for particular types of vehicles
    • B60T8/1705—Braking or traction control means specially adapted for particular types of vehicles for rail vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/321—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration deceleration
    • B60T8/3235—Systems specially adapted for rail vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L15/00—Indicators provided on the vehicle or train for signalling purposes
    • B61L15/0062—On-board target speed calculation or supervision
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L23/00—Control, warning or like safety means along the route or between vehicles or trains
    • B61L23/34—Control, warning or like safety means along the route or between vehicles or trains for indicating the distance between vehicles or trains by the transmission of signals therebetween
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T2201/00—Particular use of vehicle brake systems; Special systems using also the brakes; Special software modules within the brake system controller
    • B60T2201/02—Active or adaptive cruise control system; Distance control
    • B60T2201/022—Collision avoidance systems

Definitions

  • the present application relates to the field of computers, and in particular, to a vehicle braking method, device and train.
  • the automatic train protection system (ATP) is usually used to measure the speed of the train. After the ATP is removed, the radar auxiliary protection system is enabled to measure the distance between the vehicle and the preceding vehicle in the same direction in real time.
  • the train should decelerate according to the braking ability of the train itself before colliding with the preceding vehicle.
  • the driving experience of conductors alone is not enough to improve the safety of trains and reduce the risk of rear-end collisions.
  • the existing radar auxiliary protection system after removing ATP has a higher risk of rear-end collision and lower train driving safety.
  • the embodiments of the present application provide a vehicle braking method, device and train, which can effectively reduce the risk of rear-end collision with the preceding vehicle, Improve the safety of train operation.
  • Embodiments of the present application provide a vehicle braking method, the method comprising:
  • the preset deceleration is performed to brake the distance traveled by the host vehicle.
  • the target idling distance is the sum of the first idling distance and the second idling distance.
  • the emergency braking distance is obtained according to at least one of the first braking distance, the second braking distance and the third braking distance, and the first braking distance is performed by all bogies under normal working conditions.
  • the driving distance of braking the own vehicle, the second braking distance is the distance that all bogies brake the driving distance of the own vehicle under wet rail conditions, and the third braking distance is the removal of a preset number of turns The braking force of the rack and the distance traveled by the host vehicle when braking is performed in wet rail conditions.
  • the emergency braking distance is a maximum value among the first braking distance, the second braking distance and the third braking distance.
  • the method further includes:
  • the distance is less than or equal to a second threshold, an alarm is performed, the second threshold is greater than the first threshold, and the second threshold is determined according to the first threshold and the minimum alarm interval;
  • Embodiments of the present application also provide a vehicle braking device, the device comprising:
  • Obtaining unit used to obtain the distance between the vehicle and the preceding vehicle
  • a first alarm unit configured to issue an alarm if the distance is less than or equal to a first threshold
  • a first braking unit configured to receive a first braking command triggered by a user, and according to the first braking command, brake the host vehicle according to a first preset deceleration, wherein the first threshold is
  • the target idling distance is obtained according to the sum of the target idling distance and the emergency braking distance, and the target idling distance is obtained according to at least one of the first idling distance and the second idling distance, and the first idling distance is obtained by obtaining the own vehicle.
  • the distance traveled by the own vehicle during the distance to the preceding vehicle, the second idling distance is the distance traveled by the vehicle when the user triggers the first braking command, and the emergency braking
  • the moving distance is the distance that the host vehicle is driven by braking according to the first preset deceleration.
  • the target idling distance is the sum of the first idling distance and the second idling distance.
  • the emergency braking distance is obtained according to at least one of the first braking distance, the second braking distance and the third braking distance, and the first braking distance is performed by all bogies under normal working conditions.
  • the driving distance of braking the own vehicle, the second braking distance is the distance that all bogies brake the driving distance of the own vehicle under wet rail conditions, and the third braking distance is the removal of a preset number of turns The braking force of the rack and the distance traveled by the host vehicle when braking is performed in wet rail conditions.
  • the emergency braking distance is a maximum value among the first braking distance, the second braking distance and the third braking distance.
  • the device further includes:
  • a second alarm unit configured to perform an alarm if the distance is less than or equal to a second threshold, the second threshold is greater than the first threshold, and the second threshold is based on the first threshold and the minimum alarm interval time to determine;
  • the second braking unit is configured to receive a second braking command triggered by the user, and according to the second braking command, brake the vehicle according to a second preset deceleration, and the second preset deceleration The speed is less than the first preset deceleration.
  • Embodiments of the present application further provide a train, including a vehicle braking device
  • the vehicle braking device is used to execute any one of the vehicle braking methods provided in the embodiments of the present application.
  • the present invention has at least the following advantages:
  • An embodiment of the present application provides a vehicle braking method.
  • the method includes: acquiring the distance between the vehicle and the vehicle in front, and if the distance is less than or equal to a first threshold, alarming, and receiving a first braking triggered by a user instruction, according to the first braking instruction, the vehicle is braked according to the first preset deceleration, wherein the first threshold value is obtained according to the sum of the target idle distance and the emergency braking distance, the The target idling distance is obtained according to at least one of the first idling distance and the second idling distance, where the first idling distance is the distance traveled by the vehicle in the process of obtaining the distance between the vehicle and the preceding vehicle , the second idling distance is the distance the vehicle travels when the user triggers the braking command, and the emergency braking distance is the braking of the vehicle according to the first preset deceleration distance traveled by the car.
  • the distance from the vehicle in front is measured and compared with the threshold value. If the measured distance is less than or equal to the threshold value, the train starts to brake.
  • the braking threshold value is limited by the idling distance and the braking performance of the train itself.
  • the emergency braking distance of the vehicle is determined.
  • the vehicle braking method provided by the embodiment of the present application determines the braking threshold by taking into account the ranging capability of the radar protection system and the braking performance of the train, which can effectively reduce the risk of rear-end collision with the preceding vehicle. Improve the safety of train operation.
  • Embodiment 1 is a flowchart of Embodiment 1 of a vehicle braking method provided by the application;
  • FIG. 2 is a structural block diagram of Embodiment 1 of a vehicle braking device provided by the present application.
  • the radar auxiliary protection system is used to continue to measure the distance to the vehicle in front.
  • the ranging capability of the radar auxiliary protection system is 1 kilometer (km).
  • the risk of rear-end collision needs to take into account the ranging performance of the radar auxiliary protection system and the braking ability of the train itself to improve the safety of train operation.
  • the distance from the preceding vehicle is measured and compared with the threshold value. If the measured distance is less than or equal to the threshold value, the train starts to brake, and the braking threshold value is limited by the idling distance and the braking performance of the train itself. The moving distance is determined.
  • the vehicle braking method provided by the embodiment of the present application determines the braking threshold by taking into account the ranging capability of the radar protection system and the emergency braking performance of the train, which can effectively reduce the risk of rear-end collision with the preceding vehicle and improve the train speed. operational security.
  • FIG. 1 is a flowchart of a vehicle braking method provided in Embodiment 1 of the present application.
  • the vehicle braking method provided in this embodiment can be applied to, for example, a controller of a vehicle, and specifically includes the following steps:
  • Step 101 Obtain the distance between the vehicle and the vehicle in front.
  • the radar auxiliary protection system can be used to obtain the distance between the vehicle and the preceding vehicle, that is, the radar auxiliary protection system is used for distance detection, and the detection result is sent to the train controller.
  • the radar auxiliary protection system adopts radio frequency technology.
  • the radar auxiliary protection system of the vehicle first sends the electromagnetic wave of ranging to the radar auxiliary protection system of the preceding vehicle, and the radar auxiliary protection system of the preceding vehicle receives the electromagnetic wave of the ranging and identifies the electromagnetic wave.
  • the radar auxiliary protection system of the rear vehicle After identifying and determining that it is the electromagnetic wave of distance measurement sent by the radar auxiliary protection system of the rear vehicle, it returns the electromagnetic wave to the radar auxiliary protection system of the rear vehicle, and the radar auxiliary protection system of the vehicle receives the reply electromagnetic wave from the radar auxiliary protection system of the preceding vehicle. Then, use the transmission speed of the electromagnetic wave and the round-trip time to determine the distance between the vehicle and the preceding vehicle.
  • the embodiment of the present application may also use other ranging means to detect the distance between the vehicle and the vehicle in front, such as infrared rays, etc., which will not be repeated here.
  • the radar auxiliary protection system is used as an example for description below.
  • Step 102 If the distance is less than or equal to the first threshold, alarm.
  • the first threshold represents that the distance between the vehicle and the preceding vehicle is at a certain fixed value, and the value is independent of the relative speed of the vehicle and the preceding vehicle.
  • the detected distance between the vehicle and the vehicle in front is less than or equal to the first threshold, which means that the distance between the vehicle and the vehicle in front may be too close, and the risk of rear-end collision may be high.
  • the driver can be alerted to remind the vehicle. safety issues and reduce the risk of rear-end collisions.
  • Step 103 Receive a first braking command triggered by a user, and according to the first braking command, brake the vehicle according to a first preset deceleration, wherein the first threshold value is based on the target idling distance and the sum of the emergency braking distance, the target idling distance is obtained according to at least one of the first idling distance and the second idling distance, and the first idling distance is the distance between the vehicle and the preceding vehicle.
  • the distance traveled by the host vehicle during the distance, the second idling distance is the distance traveled by the host vehicle when the user triggers the first braking command, and the emergency braking distance is based on the The first preset deceleration is used to brake the distance traveled by the host vehicle.
  • the controller of the vehicle after detecting that the distance between the vehicle and the vehicle in front is less than or equal to the first threshold, performs alarm processing.
  • the user triggers the first braking command
  • the first The braking command refers to the command to brake the vehicle.
  • the first preset deceleration corresponds to the first braking command
  • the first preset deceleration is a fixed value.
  • the first preset deceleration may be the deceleration during emergency braking.
  • the first preset deceleration may be the maximum deceleration during emergency braking, and the maximum deceleration during emergency braking may represent the braking performance of the vehicle.
  • the first threshold is the sum of the target idle distance and the emergency braking distance.
  • the target idling distance represents the distance traveled by the vehicle before braking. This is because the train is still running during the time interval when the distance is detected, the alarm is notified, and the brake is started after receiving the alarm. During this time interval , the distance traveled by the train is the target idling distance.
  • the emergency braking distance represents the distance traveled by the vehicle after braking until it stops.
  • the radar auxiliary protection system may have a ranging deviation. Therefore, for the safety of the train, the ranging deviation of the radar auxiliary protection system can be set.
  • the first threshold is the difference between the target idle distance and the emergency braking distance.
  • the sum and the ranging deviation are determined.
  • the first threshold is the product of the sum of the target idling distance and the emergency braking distance and the ranging deviation.
  • the target idling distance can be determined, and the target idling distance can be determined according to the difference between the first idling distance and the second idling distance. At least one gets.
  • the target idling distance can be obtained according to the first idling distance.
  • the first idling distance refers to the distance traveled by the vehicle in the process of detecting the distance between the vehicle and the vehicle in front, that is, it takes time to detect the distance between the vehicle and the vehicle in front. Still driving. Specifically, the time spent by the radar protection system in detecting the distance and the maximum speed of the vehicle can be used to determine the first idling distance.
  • the time spent by the radar protection system in detecting the distance is t1, and the unit can be is seconds (s), the maximum speed of the vehicle is v1, and the unit can be meters per second (m/s), then the first idling distance L1 can be the time spent by the radar protection system in detecting the distance and the vehicle's speed.
  • the target idling distance may be obtained according to the second idling distance.
  • the second idling distance refers to the distance traveled by the vehicle when the user triggers the braking command, that is, the time spent by the user between receiving the distance alarm and triggering the braking command.
  • the second idling distance can be determined by using a certain fixed user reaction time and the driving speed of the vehicle.
  • the fixed user reaction time is t2, and the unit may be seconds (s).
  • the driving speed is v1, and the unit can be meters per second (m/s).
  • the target idling distance can also be obtained according to the first idling distance and the second idling distance.
  • the time t1 spent by the radar protection system in detecting the distance is 1s
  • the maximum speed v1 of the vehicle is 120 kilometers per hour (km/h)
  • the emergency braking distance may be determined, and the emergency braking distance may be the vehicle when braking according to the first preset deceleration. distance traveled.
  • the emergency braking distance may be obtained according to at least one of the first braking distance, the second braking distance and the third braking distance.
  • the emergency braking distance can be obtained according to the first braking distance.
  • the first braking distance is the distance traveled by the vehicle when all the bogies are braking under normal operating conditions.
  • the first braking distance can be determined by using the first preset deceleration and the driving speed of the vehicle.
  • the first preset deceleration can be the maximum deceleration of all bogies during emergency braking under normal operating conditions.
  • the travel speed can be the maximum travel speed.
  • the emergency braking distance may be obtained according to the second braking distance.
  • the second braking distance is the distance traveled by the vehicle when all the bogies are braked under wet rail conditions.
  • the second braking distance can be determined by using the first preset deceleration and the running speed of the vehicle.
  • the first preset deceleration can be the maximum deceleration of all bogies during emergency braking under wet track conditions.
  • the maximum deceleration of all bogies under emergency braking is less than the maximum deceleration of all bogies under emergency braking under normal conditions.
  • the travel speed of the host vehicle may be the maximum travel speed.
  • the maximum deceleration of all bogies during emergency braking under wet track conditions is a2
  • the unit is meters per second squared (m/s 2 )
  • the maximum speed of the vehicle is v1
  • the unit can be meters per second (m/s)
  • the emergency braking distance may be obtained according to the third braking distance.
  • the third braking distance is the distance traveled by the vehicle when the braking force of the preset number of bogies is removed for braking under wet track conditions.
  • the third braking distance may be determined by using the first preset deceleration and the traveling speed of the host vehicle.
  • the first preset deceleration may be the maximum deceleration during emergency braking when the braking force of the preset number of bogies is removed in a wet track condition
  • the driving speed of the vehicle may be the braking force of the preset number of bogies removed. The limited speed of the powered vehicle.
  • the preset number of bogies to be cut off is determined according to the actual situation. As an example, one bogie can be cut off.
  • the emergency braking distance may also be jointly obtained according to the first braking distance, the second braking distance and the third braking distance.
  • the emergency braking distance S may be the maximum value among the first braking distance, the second braking distance and the third braking distance.
  • the maximum deceleration a1 during emergency braking of all bogies under normal operating conditions is 1.2 m/s 2
  • the maximum driving speed v1 of the vehicle is 120 km/h
  • the maximum deceleration a2 of all bogies during emergency braking under wet track conditions is 0.91m/s 2
  • the maximum running speed v1 of the vehicle is 120km/h
  • the maximum deceleration a3 when the braking force of one bogie is removed under wet track conditions is 0.91m/s 2 ⁇ 11 ⁇ 12, and the braking force of one bogie is removed from the vehicle.
  • the limited speed v2 of the rear vehicle is 110km/h
  • the ranging deviation can be 5%
  • the first threshold can be rounded up to the nearest nearest integer, that is, the first threshold can be 720m.
  • the alarm for the first threshold corresponds to the emergency braking of the train, that is, if the distance between the vehicle and the vehicle in front is less than the first threshold, if emergency braking is not performed, the risk of rear-end collision is high.
  • a second threshold corresponding to regular braking may be detected before detecting the first threshold corresponding to emergency braking.
  • common braking has a longer braking distance, which can leave a longer distance for the train to brake, which can further reduce the risk of train rear-end collision.
  • the detected distance between the vehicle and the preceding vehicle can also be compared with a second threshold, and if the detected distance is less than or equal to the second threshold, an alarm is processed, and the second threshold is greater than the first threshold.
  • the second threshold value is greater than the first threshold value corresponding to emergency braking, that is, the second threshold value corresponds to the alarm distance used for normal braking.
  • the detected distance between the vehicle and the vehicle in front is less than or equal to the second threshold, which means that the distance between the vehicle and the vehicle in front is less than or equal to a certain fixed value, that is, the distance between the vehicle and the vehicle in front is close, and there may be a risk of rear-end collision , the vehicle driver can be alerted to remind the vehicle of safety problems and reduce the probability of rear-end collisions.
  • the second threshold may be determined according to the first threshold and the minimum alarm interval.
  • the minimum alarm interval is the time interval between the first threshold for alarming and the second threshold for alarming. The time interval cannot be too short, which will cause continuous alarms, affect the user's judgment, and bring unnecessary driving risks.
  • the second threshold may be determined according to the first threshold, the minimum alarm interval time and the driving speed of the vehicle.
  • an alarm process is performed.
  • the user triggers a second braking command.
  • the second braking command refers to the When the vehicle brakes according to the second braking command, there is a corresponding second preset deceleration for braking.
  • the second preset deceleration corresponds to the second braking command, and the second preset deceleration
  • the deceleration is smaller than the first preset deceleration, and the second preset deceleration is a fixed value.
  • the second preset deceleration may be the deceleration during normal braking.
  • the second preset deceleration may be the deceleration during normal braking, and the deceleration during normal braking may be 1.0 m/s 2 .
  • the second threshold can also be determined according to the sum of the target idle distance and the common braking distance, and the target idle distance of the second threshold can be the same as the target idle distance of the first threshold, that is, the target idle distance
  • the idling distance can be obtained according to the first idling distance and the second idling distance.
  • the normal braking distance is the distance traveled by the vehicle when braking according to the second preset deceleration.
  • the second preset deceleration is smaller than the first preset deceleration.
  • the common braking distance can be obtained according to at least one of the first common braking distance, the second common braking distance and the third common braking distance.
  • the maximum deceleration a2 of all bogies during common braking under wet track conditions is 0.91m/s 2
  • the maximum driving speed v1 of the vehicle is 120km/h
  • the maximum deceleration a3 when the braking force of one bogie is removed in the wet track condition is 0.91m/s 2 ⁇ 11 ⁇ 12, and the braking force of the vehicle when one bogie is removed is 0.91m/s.
  • the value determined by the first threshold and the minimum alarm interval time may also be compared with the maximum value of the sum of the target idle distance and the normal braking distance, and the maximum value of the two may be determined as the second threshold value .
  • the distance from the vehicle in front is measured and compared with the threshold value. If the measured distance is less than or equal to the threshold value, the train starts to brake.
  • the braking threshold value is limited by the idling distance and the braking performance of the train itself.
  • the braking distance of the vehicle is determined.
  • the vehicle braking method provided by the embodiment of the present application determines the braking threshold by taking into account the ranging capability of the radar protection system and the braking performance of the train, which can effectively reduce the risk of rear-end collision with the preceding vehicle and improve the Safety of train operation.
  • the embodiments of the present application also provide a vehicle braking device, the working principle of which will be described in detail below with reference to the accompanying drawings.
  • FIG. 2 is a structural block diagram of a vehicle braking device 200 according to an embodiment of the present application.
  • the vehicle braking device 200 provided in this embodiment includes:
  • an obtaining unit 210 configured to obtain the distance between the vehicle and the preceding vehicle
  • a first alarm unit 220 configured to issue an alarm if the distance is less than or equal to a first threshold
  • the first braking unit 230 is configured to receive a first braking command triggered by a user, and according to the first braking command, brake the vehicle according to a first preset deceleration, wherein the first braking The threshold value is obtained according to the sum of the target idling distance and the emergency braking distance, the target idling distance is obtained according to at least one of the first idling distance and the second idling distance, and the first idling distance is to obtain the The distance traveled by the vehicle during the distance between the vehicle and the vehicle in front, the second idling distance is the distance traveled by the vehicle during the user triggering the first braking command, the emergency The braking distance is the distance that the host vehicle is driven by braking according to the first preset deceleration.
  • the target idling distance is the sum of the first idling distance and the second idling distance.
  • the emergency braking distance is obtained according to at least one of the first braking distance, the second braking distance and the third braking distance, and the first braking distance is a normal working condition
  • the driving distance of the vehicle under all bogies to brake the vehicle, the second braking distance is the distance that all the trucks brake the vehicle to travel under wet rail conditions, and the third braking distance is the cut-off distance
  • the braking force of a preset number of bogies and the distance traveled by the host vehicle are braked under wet rail conditions.
  • the emergency braking distance is a maximum value among the first braking distance, the second braking distance and the third braking distance.
  • the vehicle braking device 200 further includes:
  • a second alarm unit configured to perform an alarm if the distance is less than or equal to a second threshold, the second threshold is greater than the first threshold, and the second threshold is based on the first threshold and the minimum alarm interval time to determine;
  • the second braking unit is configured to receive a second braking command triggered by the user, and according to the second braking command, brake the vehicle according to a second preset deceleration, and the second preset deceleration The speed is less than the first preset deceleration.
  • the vehicle braking device 200 is a device corresponding to the method provided by the above method embodiments, the specific implementation of each unit of the vehicle braking device 200 is the same concept as the above method embodiments.
  • the specific implementation of each unit of the vehicle braking device 200 reference may be made to the description part of the above method embodiments, which will not be repeated here.
  • Embodiments of the present application also provide a train, including a vehicle braking device.
  • the vehicle braking device may be used to execute any vehicle braking method provided in the embodiments of the present application.
  • the realization of all or part of the processes in the above method embodiments can be accomplished by instructing relevant hardware through a computer program, and the program can be stored in a computer-readable storage In the medium, when the program is executed, it may include the processes of the foregoing method embodiments.
  • the storage medium may be a magnetic disk, an optical disk, a read-only memory (Read-Only Memory, ROM) or a random access memory (Random Access Memory, RAM) or the like.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Regulating Braking Force (AREA)

Abstract

Procédé et dispositif (200) de freinage de véhicule et train. Le procédé de freinage consiste : à obtenir la distance entre un véhicule et un véhicule avant (101) ; à fournir une alarme si la distance est inférieure ou égale à un premier seuil (102) ; à recevoir une première instruction de freinage déclenchée par un utilisateur et à freiner le véhicule à une première décélération prédéfinie en fonction de la première instruction de freinage, le premier seuil étant obtenu en fonction de la somme d'une distance d'arrêt au ralenti cible et d'une distance de freinage d'urgence, la distance d'arrêt au ralenti cible étant obtenue en fonction d'une première distance d'arrêt au ralenti et/ou d'une seconde distance d'arrêt au ralenti, la première distance d'arrêt au ralenti étant la distance de déplacement du véhicule dans le processus d'obtention de la distance entre le véhicule et le véhicule avant, la seconde distance d'arrêt au ralenti étant la distance de déplacement du véhicule dans le processus de déclenchement par l'utilisateur de la première instruction de freinage, et la distance de freinage d'urgence étant la distance de déplacement pour le freinage du véhicule à la première décélération prédéfinie (103). Les effets bénéfiques sont : qu'un seuil de freinage est déterminé en tenant compte de la capacité de mesure de distance et des performances de freinage d'un train, que le risque de collision arrière avec un véhicule avant peut être efficacement réduit et que la sécurité de fonctionnement du train est améliorée.
PCT/CN2021/094001 2020-10-19 2021-05-17 Procédé et dispositif de freinage de véhicule, et train WO2022083113A1 (fr)

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CN112172870B (zh) 2023-01-03
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